Boiler-flue-expander attachment.



No. 835,556. PATENTED NOV. 18, 1906. D. M. (in A. C. REMSON.

BOILER PLUE EXPANDER ATTACHMENT.

APPLICATION FILED FEB.15,190G.

twenrou/ UNITED STATES PATENT OFFICE.

DAVID M. REMSON AND ANDREW O. REMSON, OF TALLADEGA, ALABAMA.

BOlLER-FLUE-EXPANDER ATTACHMENT- Specification of Letters Patent.

Patented Nov. 13, 1906.

Application filed February 15, 1906. Serial No. 301,298.

To all whmn it natty concern.-

Be it known that we, DAVID M. REMsoN and ANDREW C. REMsoN, citizens of the United States, residing at Talladega, in the county of Talladega and State of Alabama, have invented certain new and useful Improvements in Boiler-Flue-Exp ander Attach-' ments, of which the following is a specification.

This invention relates to an attachment for boiler-flueexpanders of that type which comprise a tool-stock provided with a series of cylindrical rollers.

The'primary object of the invention is to provide a cutting attachment which is so designed as to replace one of the cylindrical rollers in the stock when it is desired to employ the tool as a flue-cutter.

To this end the invention consists, essentially, of an approximately cylindrical block which is provided upon its outer face with a flue-cutter, while the inner face is recessed for the reception of antifriction-rollers which engage with the spindle.

For a full description. of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the following description and accompanying drawings, in which Figure 1 1s a perspective view of a flue-expander provided with the cutting attachment. Fig. 2 is a transverse sectional view through the same. Fig. 3 is a detail perspective view of the attachment.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

This device can be employed with equal facility in connection with any of the conventional types of boiler-flue expanders.

The numeral 1 designates the cylindrical tool-stock of the flue-expander, which is made of such a size as to fit loosely within the flue and is provided with a central longitudinal opening 2. A series of longitudinal slots 3,

preferably three in number, as shown in the drawings, are formed in the outer face of the stock 1 and communicate with a chamber 4, formed by enlarging the longitudinal opening 2 at an intermediate point. The sides of the chamber 4 connect the outer edges of the slots 3, so that in the case under consideration the chamber has an approximately triangular cross-section. This also has the effect of causing the sides of the slots 3 to flare or diverge inwardly toward the center of the stock 1. I

When the tool is em loyed as a flue-expander, a cylindrical ro ler 5 is inserted in each of the slots 3 from the inner side thereof, said rollers having the same length as the slots, so that there canbeno longitudinal play, and also being formed with a diameter slightly greater than the width of the slots, so that they cannot be entirely forced through the same. A spindle 6, which preferably tapers toward the end thereof, is inserted through the opening 2, so as to engage with the cylindrical rollers 5. It will thus be apparent that by turning the spindle 6 the rollers 5 will be caused to rotate and that as the tapering spindle is gradually pushed inward the rollers will be pushed out, so as to expand the flue.

The essential feature of this invention is in the provision of a cutting attachment which can be inserted in the tool-stock in the place of one of the cylindrical rollers 5 when it is desired to transform the flue-expander into a flue-cutter. This cutting attachment comprises a block 7, which is preferably approximatcly cylindrical in shape and has a diameter corresponding to the diameter of the rollers. The outer face of the block, or that which projects beyond the surface of the tool-stock 1, is formed with a transverse groove 8, within which a rotating cuttingdisk 9 is mounted. This disk 9 has the usual V-shaped cutting edge and is supported by a pin 10, which is inserted into the block 7 from one end thereof and passes across the beforementioned transverse groove. The end of the pin 10 upon which the cutting-disk 9 is mounted is preferably somewhat reduced in cross-section, as is shown in the drawings, although this feature is by no means essential. The inner face of the block 7, or that which comes into contact with the spindle 6, is provided with a longitudinal recess 12, the base of which is formed with a series of longitudinal grooves or depressions 13 which serve as bearings for the antifriction-rollers 14. The sides of the recess 12 curve slightly inward and conform to the shape of the anti.- friction-rollers 14 in order to overcome any tendency of the latter to become displaced. Where two antifriction-rollers 14 are employed, asis shown in the present instance, it will be apparent that any lateral displacement is impossible and that the antifrictionrollers can only be removed by slipping them ICO out longitudinally. When this cutting attachment is inserted in the tool-stock 1, the

spindle 6 is passed through the opening 2 in the usual manner and revolves the cylindrical rollers 5, but does not cause the block 7 to rotate, owing to the action of the antifriction-rollers 14. The rotation of the cylindrical rollers 5 causes the tool-stock 1 to rotate within the boiler-flue, and the cuttingdisk 9 is thus carried around within the flue, so as to come into contact within the entire circumference of the same, and is caused to cut the fine as the tapering spindle 6 is forced inward and the block 7 and cylindrical rollers 5 correspondingly forced outward.

In the applicationof the cutting device it 'is intended to be made in different sizes corresponding to the different sizes of cylindrical rollers employed in the different sizes of expanders and to be used interchangeably with the rollers, according to whether the tool is to be employed'as an expander or a cutter.

Having thus described the invention, What is claimed as new 1s 1. The combination of a tool-stock having a longitudinal opening therethrough and provided with a series of slots having communication with the opening, a block adapted to be inserted into one of the slots and having a transverse groove in its outer face and a longitudinal groove in its inner face, a robe inserted into one of the slots, a cuttingdisk mounted upon the outer face of the block, a series of antifriction-rollers located in a recess in the inner face of the block, said recess being formed with depressions which serve as bearings for the antifriction-rollers, and a spindle passing through the longitudinal opening through the tool-stock and adapted to engage with the before-mentioned antifriction-rollers upon the block.

In testimony whereof we ahix our signatures in presence of two witnesses.

DAVID M. REMSON. [L. s.] ANDREW O. REMSON. [L. s.]

Witnesses:

ToM P. WILLIAMS, C. HOWARD JEMISON. 

